REDUCING REGISTRATION TRAFFIC FOR MULTITIER PERSONAL COMMUNICATIONS SERVICES

This paper presents an architecture for the multitier personal communi cations system (PCS) and intelligent algorithms for mobility managemen t (specifically, the registration procedure). The multitier PCS system architecture considered in this study integrates three individual tie rs: a high-tier system, a licensed low tier, and a unlicensed low tier . These three tiers are integrated into a single system by using a sin gle home-location register (HLR) or the multitier HLR (MHLR). Under th is architecture, we describe a registration protocol, where the mobile station (MS) is allowed to register to the MHLR on only one tier at a ny given time. We propose several intelligent algorithms for the MS to determine whether to perform registration or not in various situation s to reduce the registration traffic.